The leakproof connection to plastics and spiro-tubes !

塑料管和螺旋管防漏接口！

Applied to leakproof seal . To ensure the independence of the circulatory system .

主要防漏密封作用，确保循环系统的独立性。

Test results lead to design of long-life leakproof stem seal .

试验结果导致长寿命的防泄漏阀杆密封结构设计。

Tight , leakproof engineered seals and bi-directional operation .

紧密、无泄漏的工程密封和双向操作。

Covers sheathing and underlayment techniques , as well as secrets for installing leakproof valleys .

盖罩和垫层的技术，以及安装防漏山谷秘密。